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Linux/tools/build/feature/test-bpf.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 #include <asm/unistd.h>
  3 #include <linux/bpf.h>
  4 #include <unistd.h>
  5 
  6 #ifndef __NR_bpf
  7 # if defined(__i386__)
  8 #  define __NR_bpf 357
  9 # elif defined(__x86_64__)
 10 #  define __NR_bpf 321
 11 # elif defined(__aarch64__)
 12 #  define __NR_bpf 280
 13 # elif defined(__sparc__)
 14 #  define __NR_bpf 349
 15 # elif defined(__s390__)
 16 #  define __NR_bpf 351
 17 # else
 18 #  error __NR_bpf not defined. libbpf does not support your arch.
 19 # endif
 20 #endif
 21 
 22 int main(void)
 23 {
 24         union bpf_attr attr;
 25 
 26         /* Check fields in attr */
 27         attr.prog_type = BPF_PROG_TYPE_KPROBE;
 28         attr.insn_cnt = 0;
 29         attr.insns = 0;
 30         attr.license = 0;
 31         attr.log_buf = 0;
 32         attr.log_size = 0;
 33         attr.log_level = 0;
 34         attr.kern_version = 0;
 35         attr.prog_flags = 0;
 36 
 37         /*
 38          * Test existence of __NR_bpf and BPF_PROG_LOAD.
 39          * This call should fail if we run the testcase.
 40          */
 41         return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
 42 }
 43 

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